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5e47fc7e22
The sam0 rtt busy loops for 180us every time an alarm is set or the counter is read, this propagates and leads to timing errors on ztimer_msec that are higher than > +-1msec. The same goes for fe310.
117 lines
3.7 KiB
Makefile
117 lines
3.7 KiB
Makefile
#
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# ztimer dependencies
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#
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# "ztimer" is the default meta-module of ztimer
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ifneq (,$(filter ztimer,$(USEMODULE)))
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USEMODULE += ztimer_core
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USEMODULE += ztimer_convert_frac
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USEMODULE += ztimer_convert_shift
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ifneq (,$(filter auto_init_ztimer,$(USEMODULE)))
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USEMODULE += ztimer_init
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endif
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DEFAULT_MODULE += auto_init_ztimer
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DEFAULT_MODULE += ztimer_init
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endif
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# unless ztimer_xtimer_compat is used, make xtimer use ztimer_usec as backend.
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ifneq (,$(filter ztimer_periph_timer,$(USEMODULE)))
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ifneq (,$(filter xtimer,$(USEMODULE)))
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ifeq (,$(filter ztimer_xtimer_compat,$(USEMODULE)))
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USEMODULE += xtimer_on_ztimer
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endif
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endif
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ifneq (,$(filter evtimer,$(USEMODULE)))
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USEMODULE += evtimer_on_ztimer
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endif
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endif
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# make xtimer use ztimer_usec as low level timer
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ifneq (,$(filter xtimer_on_ztimer,$(USEMODULE)))
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USEMODULE += ztimer_usec
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endif
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# make evtimer use ztimer_msec as low level timer
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ifneq (,$(filter evtimer_on_ztimer,$(USEMODULE)))
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USEMODULE += ztimer_msec
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USEMODULE += ztimer_now64
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endif
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# "ztimer_xtimer_compat" is a wrapper of the xtimer API on ztimer_used
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# (it is currently incomplete). Unless doing testing, use "xtimer_on_ztimer".
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ifneq (,$(filter ztimer_xtimer_compat,$(USEMODULE)))
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USEMODULE += div
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USEMODULE += ztimer_usec
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endif
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ifneq (,$(filter ztimer_%,$(USEMODULE)))
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USEMODULE += ztimer_core
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USEMODULE += ztimer_extend
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endif
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ifneq (,$(filter ztimer_convert_%,$(USEMODULE)))
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USEMODULE += ztimer_convert
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endif
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ifneq (,$(filter ztimer_periph_timer,$(USEMODULE)))
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FEATURES_REQUIRED += periph_timer
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endif
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ifneq (,$(filter ztimer_periph_rtc,$(USEMODULE)))
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FEATURES_REQUIRED += periph_rtc
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endif
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ifneq (,$(filter ztimer_periph_rtt,$(USEMODULE)))
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FEATURES_REQUIRED += periph_rtt
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endif
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ifneq (,$(filter ztimer_periph_ptp,$(USEMODULE)))
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FEATURES_REQUIRED += periph_ptp_timer
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endif
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ifneq (,$(filter ztimer_convert_frac,$(USEMODULE)))
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USEMODULE += frac
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endif
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ifneq (,$(filter ztimer_usec,$(USEMODULE)))
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USEMODULE += ztimer
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USEMODULE += ztimer_periph_timer
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endif
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# NOTE: select the module here and not in the CPU so that order of inclusion
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# does not have periph_rtt selected earlier that it should be while at the same
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# time avoiding the module 'ztimer-no_periph_rtt' being included unecesarily.
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# The sam0 rtt busy loops for 180us every time an alarm is set or
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# the counter is read, this propagates and leads to timing errors
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# on ztimer_msec that are higher than > +-1msec.
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# The same goes for the fe310 rtt.
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ifneq (,$(filter sam% fe310,$(CPU)))
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USEMODULE += ztimer_no_periph_rtt
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endif
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ifneq (,$(filter ztimer_msec ztimer_sec,$(USEMODULE)))
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USEMODULE += ztimer
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ifeq (,$(filter ztimer_no_periph_rtt,$(USEMODULE)))
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FEATURES_OPTIONAL += periph_rtt
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# HACK: periph_rtt will get used only in the next iteration but an updated
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# state for FEATURES_USED is needed here so include `features_check.inc.mk`
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# here instead.
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# An other option would be to check FEATURES_PROVIDED this would avoid the
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# order of inclusion problem but it would no take into account possible conflicts
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# and is also currently not allowed in the build system.
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# An other alternative would be to delay to the next loop, but this produce a
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# case where another loop is not executed and the conditional not evaluated
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# If these kind of usecases pop up before Kconfig migration is completed
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# then another alternative would be introduce a variable to require an extra
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# loop independent of USEMODULE, FEATURES_REQUIRED and USEPKG
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include $(RIOTMAKE)/features_check.inc.mk
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ifneq (,$(filter periph_rtt,$(FEATURES_USED)))
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USEMODULE += ztimer_periph_rtt
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else
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USEMODULE += ztimer_periph_timer
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endif
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else
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USEMODULE += ztimer_periph_timer
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endif
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endif
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